Nobody said there are not. I think the argument is that a nontrivial portion of IMF economists are from UVLRM and are not very well-versed in rigorous economic theory (they do understand qualitative economics though, which is all what one needs as an IMF economist)

I joined the IMF in the past so as to take as many ICs as I could stomach and that way, get a job at the IMF. But I realized that I enjoyed taking the ICs for the sake of it, so I no longer intend to get an IMF job.